40144234021 has 8 divisors (see below), whose sum is σ = 41737337600. Its totient is φ = 38569763520.

The previous prime is 40144234003. The next prime is 40144234043. The reversal of 40144234021 is 12043244104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40144234021 - 2⁷ = 40144233893 is a prime.

It is a super-2 number, since 2×40144234021² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40144234121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4653876 + ... + 4662493.

It is an arithmetic number, because the mean of its divisors is an integer number (5217167200).

Almost surely, 2^40144234021 is an apocalyptic number.

It is an amenable number.

40144234021 is a deficient number, since it is larger than the sum of its proper divisors (1593103579).

40144234021 is a wasteful number, since it uses less digits than its factorization.

40144234021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9316539.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 40144234021 its reverse (12043244104), we get a palindrome (52187478125).

The spelling of 40144234021 in words is "forty billion, one hundred forty-four million, two hundred thirty-four thousand, twenty-one".